excuse me? What makes pro circuit cod players different from someone who plays public? are you saying they're no better? you be "good" at cod by having more skills than other players. map knowledge, gun skill, accuracy, knowledge of the game modes, much more. give me an example of a game that you can be good at then

You just listed things that can make you good at cod. Same concept says you can't be good at chest, you just memorizing patterns of pieces and their abilities, also memorizing different opponent strategies